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TM 750-116
3-15. Telescopes, Elbow.
a. Elbow Telescope, M114 (fig. 3-66).
Figure 3-66 M114 Elbow Telescope
(1) Perform purging and charging procedure para
2-5.b.
(2) Purge instrument at 5 psig for 5 minutes.
(3) Charge instrument at 1 psig for 10 seconds.
(4) Leak test for minimum of 5 minutes.
b. Elbow Telescope, M114A1 (fig. 3-66). Refer
to para 3-15.a. for procedures.
e. Elbow Telescope, M138 (fig. 3-68).
Figure 3-68 M138 Elbow Telescope
(1) Perform purging and charging procedure para
2-5.a.
(2) Purge instrument at 8 psig for 5 minutes.
(3) Ensure relief valve closes at 5 psig.
Elbow Telescope, M16 and M116 Series (fig.
c.
3-69). Refer to para 3-15.f. for procedures.
(4) Leak test for minimum of 5 minutes.
Elbow Telescope, M118 Series (fig. 3-67).
f. Elbow Telescope, M139 (fig. 3-69).
d.
NOTE
The telescope must be removed from the in-
stalled position for purging and charging proce-
dures. Refer to appendix A for a listing of
applicable end item manuals.
Figure 3-67 M118A2/M118A3 Elbow Telescope
Figure 3-69 M139 Elbow Telescope
(1) Perform purging and charging procedure para
2-5.b.
(2) Purge instrument at 5 psig for 15 minutes.
(1) Perform purging procedure para 2-5.d.
(3) Charge instrument at 1 psig for 1 minute.
(2) Purge instrument at 5 psig for 5 minutes.
(4) Leak test for minimum of 5 minutes.
3-28
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